The magnetic moment induced on Rh atoms, forming 1.6 nm average diameter clusters, embedded in an ${\mathrm{Al}}_2{\mathrm{O}}_3$ matrix, has been determined using x-ray magnetic circular dichroism measurements. The magnetic moment varies linearly with the applied magnetic field. At 2.3 K and under 17 T, the spin magnetic moment amounts to $0.067(2){\mu }_{\mathrm{B}}/\mathrm{Rh}$ atom. The orbital moment does not exceed 2% of the spin moment. The susceptibility is highly temperature dependent. This is in agreement with a prediction due to Moriya and Kawabata, that in itinerant electron systems, close to the onset of magnetism, the renormalization of the magnetic susceptibility by electron correlations, leads to a Curie-like behavior.

• Received 15 March 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.197204